Three people at the same table say yes to the same request. One of them can't stand the thought of the asker being let down. One hopes to be the favorite. One is thinking of a person who is not in the room. From across the table you would see three people being agreeable. I am a people pleaser.
This is the reason the library never reads a rule off a behavior.
01
What it looks like
One behavior, seen from outside, with nothing to distinguish its sources.
Pleasing is the plainest case. It can come from Peace, from Chosen, from Approval or from Needed. The yes sounds the same in all four.
The same holds for most of the strategies on this site. Controlling, staying busy, going quiet and over-explaining each have more than one rule that can be under them.
02
Why it works this way
A strategy is something a person does, and the same thing can be done for different reasons.
What the strategy protects against is the fear under the rule. Under Peace, the fear is that someone's disappointment means you did something wrong. Under Chosen, it is that if you are not selected, you were not enough to select. Under Approval, it is that without their verdict you don't know what you are worth. Under Needed, it is that without your usefulness there is no reason for you.
Four different fears, and one of the handiest ways to manage any of them is to say yes.
03
What it buys and what it costs to know this
It saves effort that was going to the wrong place. Advice aimed at the behavior, such as learn to say no, treats four situations as one, and may not reach any of them.
It costs the comfort of a simple label. I'm a people pleaser is easy to say. It may be true and still not tell you much.
04
How the difference gets found
Not by looking harder at the behavior.
It gets found with questions that separate one rule from another. For Peace and Needed: is it worse when they're upset with you, or when they don't need you? Upset is the Peace answer. Not needed is the Needed answer. For Peace and Approval: is it anyone being upset with you, or one person's verdict? Anyone is the Peace answer. One person, someone you can name, is the Approval answer.
Questions like these belong to subtraction. Each removes a possibility. If none of them removes anything, there is not enough to tell yet, and that is a result. It is also possible that a strategy has no rule under it at all. Some people say yes because they want to.
The basic distinction is on Rule vs. Protective Strategy: Why "I'm a People-Pleaser" May Not Be the Root.